CNBLUE's Yonghwa expressed that he's the most happy with the group's latest comeback than he has been since their debut three years ago.

The four-member band released their 4th mini-album, 'Re:BLUE', and its title track "I'm Sorry" earlier this week. They quickly achieved an all-kill with the track, which isn't surprising considering the album surpassed 100,000 pre-orders.

Yonghwa tweeted on the 17th, "We'll see you at MBC. There's a concert today too. Concert. Joyful promotions. The happiest promotions since debuting 3 years ago. 'I'm Sorry, I'm Sorry'."

He later added, "PS: People I met on the street said, 'Yonghwa, your self-composed song is so good.' This [comeback] is a success," sharing his happiness.

Check out the "I'm Sorry" MV below if you missed it!